Reference no: EM131653724
1. Which of the following is a term used to describe all chemical reactions in a cell?
a. anabolism
b. metabolism
c. catabolism
d. coupled reaction
2. Enzymes speed the rate of reaction by
a. Increasing collisions between substrates
b. Lowering energy of activation
c. Increasing the potential energy
d. All of the above
3. What is the active site of the enzyme?
a. the protein part of the molecule
b. the part of the enzyme that complexes with the substrate
c. the part that hydrolyzes its substrate
d. none of the above
4. When an active enzyme is prevented from combining with its substrate, enzyme inhibition occurs. What type of inhibition happens when a molecule binds to the enzyme at the active site?
a. feedback
b. noncompetitive or Allosteric
c. competitive
d. none of the above
5. Total of _____________ ATP are produced per molecule of glucose in cellular respiration.
a. 32-38
b. 2
c. 28
d. 10
6. The following cofactors are used during kreb's cycle
a. NAD+
b. NADP
c. FAD
d. A & b are true
e. a& C are true
7. The following is not true for glycolysis
a. 4 ATPs (net) are generated
b. NAD is reduced
c. Glucose breaks down to pyruvate
d. It occurs in cytoplasm
e. All of the above
8. The following is true for Fermentation
a. Glucose breaks down to lactate
b. 2 (net) ATPs are made
c. NADH is oxidized
d. All of the above are true
9. Product of fermentation in yeast cells is ________________.
a. CO2 & Ethanol
b. Lactic acid
c. Propionic acid
d. Pyruvate
10. Total of _____________ ATP are produced per molecule of glucose in cellular respiration.
a. 34
b. 2
c. 38
d. 10
11. The following cofactors are used during kreb's cycle
a. NAD+
b. NADP
c. FAD
d. A & b are true
e. a& C are true
12. Helicobacter pylorii is damaged by very high levels of oxygen. It is ______________ organisms
a. Obligate aerobic
b. Microaerophile
c. Obligate anaerobic
d. Facultative
13. Function of superoxide dismutase is to
a. Neutralize oxygen
b. Neutralize OH-
c. Neutralize superoxide
d. Neutralize H2O
14. Bacteria that grow and survive at low pH conditions are
a. Psychrophiles
b. Acidophiles
c. Basophiles
d. All of the above
15. A colony forming unit is
a. Colony generated from any clinical specimen
b. Colony generated from a single cell
c. Colony generated from many similar cells
d. None of the above
16. Crystal violet inhibits growth of gram positive bacteria. It is an example of
a. Selective media
b. Defined media
c. Differential media
d. Complex media
17. The following is a phase of maximum growth
a. Lag phase
b. Stationary phase
c. Log phase
d. Death phase
18. The following is a direct method of counting bacteria
a. Turbidity
b. Measuring dry weight
c. Most probable number
d. Measuring metabolic activity
19. The following is a type of eukaryotic cell.
a) Animal
b) Plant
c) Protozoa
d) Fungus
e) All of the above
20. Eukaryotes use the following means for reproduction.
a) Sexual
b) Asexual
c) Both
21. Eukaryotes that contain two copies of genome in the nucleus are called
a) Haploid
b) Diploid
c) Polyploid
22. After meiosis, the nucleus contains _______________ genome.
a) Haploid
b) Diploid
c) Polyploid
23. The following is true for protozoa.
a) They are eukaryotic
b) They are unicellular
c) They are motile
d) Some of them can be pathogenic
e) All of the above
24. "Protozoa thrive in extremely dry weather conditions." This statement is
a. True
b. False
25. Fungi are _____________ .
a) Autotrophic
b) Heterotrophic
26. Viruses are
a) Prokaryotic
b) Eukaryotic
c) Acellular
27. The structure of virus is made of
a) Proteins
b) Nucleic acid
c) Plasma membrane (may or may not)
d) All of the above
28. Viruses contain the following type of genome
a) Circular
b) Linear
c) both
29. "The lytic cycle results in the death of the host." This statement is
a. True
b. False
30. Prion is
a) An infectious protozoa
b) An infectious virus
c) An infectious protein
d) An infectious RNA